/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */
package org.jbpm.workflow.core;

/**
 * Represents a constraint in a RuleFlow.
 * Can be used to specify conditions in (X)OR-splits.
 * 
 */
public interface Constraint {
    /**
     * Typically this method returns the constraint as a String
     * 
     * @return the constraint
     */
    String getConstraint();

    /**
     * Method for setting the constraint
     * 
     * @param constraint the constraint
     */
    void setConstraint(String constraint);

    /**
     * Returns the name of the constraint
     * 
     * @return the name of the constraint
     */
    String getName();

    /**
     * Sets the name of the constraint
     * 
     * @param name the name of the constraint
     */
    void setName(String name);

    /**
     * Returns the priority of the constraint
     * 
     * @return the priority of the constraint
     */
    int getPriority();

    /**
     * Method for setting the priority of the constraint
     * 
     * @param priority the priority of the constraint
     */
    void setPriority(int priority);

    /**
     * Returns the type of the constraint,
     * e.g. "code" or "rule"
     * 
     * @return the type of the constraint
     */
    String getType();

    /**
     * Method for setting the type of the constraint,
     * e.g. "code" or "rule"
     * 
     * @param type the type of the constraint
     */
    void setType(String type);

    /**
     * Returns the dialect of the constraint,
     * e.g. "mvel" or "java"
     * 
     * @return the dialect of the constraint
     */
    String getDialect();

    /**
     * Method for setting the dialect of the constraint,
     * e.g. "mvel" or "java"
     * 
     * @param dialect the dialect of the constraint
     */
    void setDialect(String dialect);

    public boolean isDefault();

    public void setDefault(boolean isDefault);

    void setMetaData(String name, Object value);

    Object getMetaData(String name);

}
